CN1014690B - Extruding apparatus for extruding synthetic resin - Google Patents
Extruding apparatus for extruding synthetic resinInfo
- Publication number
- CN1014690B CN1014690B CN90102280A CN90102280A CN1014690B CN 1014690 B CN1014690 B CN 1014690B CN 90102280 A CN90102280 A CN 90102280A CN 90102280 A CN90102280 A CN 90102280A CN 1014690 B CN1014690 B CN 1014690B
- Authority
- CN
- China
- Prior art keywords
- machine barrel
- screw rod
- steam vent
- squeezer
- resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A structure of an extruding apparatus for extruding a synthetic resin, including a first extruder and a second extruder having a vent hole, is disclosed. The extruding apparatus includes: a first extruder; and a second extruder having a cylinder with a vent hole, a supply port provided at the proximal end of the cylinder, and connected to a discharge port of the first extruder, a distribution/supply means provided inside the cylinder, having a plurality of passages for fluidically connecting the supply port and a space inside the cylinder, and distributing and supplying a molding material supplied to the supply port into the cylinder, a discharge port provided at the distal end of the cylinder, a screw shaft arranged inside the cylinder, and a motor for driving the screw shaft. An airtight vacuum chamber connected to the vacuum pump is mounted on an outer portion of the vent hole.
Description
The present invention relates to the extrusion equipment of extrusion synthetic resin, more particularly, relate to the equipment of the extrusion synthetic resin that the charging aperture that comprises two squeezers, one of them squeezer links to each other with the discharging opening of another squeezer.
Open (Kokai) 48-79864 of Japan Patent discloses a kind of common extrusion equipment.This extrusion equipment includes first and second squeezers, and each squeezer all has a machine barrel, and a screw rod is all arranged in each machine barrel.Being positioned at the second anterior squeezer has a charging aperture, and it links to each other with the first squeezer discharging opening that is positioned at the rear portion.This charging aperture has a cross section size and the corresponding cross section of moulding material cross section size of sending into the second squeezer machine barrel.
Therefore, moulding material is softened into the fritting state by first squeezer that is positioned at the back, and is admitted to the machine barrel of this second squeezer and the space between the screw rod by the charging aperture of second squeezer.But, when this space has been full of slackmelt resin, just problem has appearred on the scroll of screw rod or the screw rod outer surface the scraper plate.More particularly, not feed phenomenon has taken place axially, and the resin of this fritting sticks to screw rod in appearance on the outer surface of screw rod.The resin of fritting is accumulation gradually on the resin that has adhered to, and therefore the space cross-sectional area between machine barrel and the screw rod is significantly reduced.In addition, having adhered to long resin can break away from from screw rod, and is sent to discharging opening, and the result makes the load instability of resin, and the quality of resin reduces.
Open last disclosed second squeezer of (Kokai) 48-79864 of Japan Patent has a steam vent, the gas that produces when being used to discharge the moulding material fusing.This common steam vent is positioned in the position that is heated and begins to melt near the thin slice that is used as moulding material in the machine barrel, and vertically passes machine barrel.In addition, this steam vent directly links to each other with a vavuum pump usually.
Yet near some molten resin the steam vent is also outwards extruded from steam vent, and is aspirated by vavuum pump, thereby has disturbed the operation of vavuum pump.When vavuum pump can not normally move, the operation that must temporarily stop this squeezer perhaps was transferred on another prepositioned auxiliary pump this vavuum pump to drive squeezer during cleaning this vavuum pump to clean this vavuum pump.Such process has hindered extrusion operation significantly and has improved operating cost inevitably.
The objective of the invention is to provide the extrusion equipment of an extrusion synthetic resin, it can make the load of the molten resin that pushes out from the second squeezer discharging opening stable, and it can be driven continuously and not need periodically to stop its operation.
Above purpose is that the extrusion equipment by following extrusion resin reaches, and this equipment comprises:
One first squeezer, it has
One first machine barrel,
There is one moulding material sent into first charging aperture of this first machine barrel at the near-end of first machine barrel,
First discharging opening that has a moulding material that will be included in first machine barrel to send at the far-end of first machine barrel,
Be positioned in first machine barrel and have one first screw rod of a scroll, and
Link to each other with this first screw rod and drive one first motor of this screw rod;
One second squeezer, it has
One second machine barrel,
There is one moulding material sent into second charging aperture of this second machine barrel at the near-end of this second machine barrel,
In this second machine barrel distribution/feed arrangement is arranged, it has a plurality of paths, and be used for that fluid ground is carried out in the space of second charging aperture and second machine barrel and be communicated with, and will supply with the moulding material distribution of second charging aperture and be delivered in second machine barrel by these paths,
Far-end at second machine barrel has one second discharging opening, and it gives off the moulding material that is included in second machine barrel,
Be placed in second screw rod in second machine barrel with scroll.
Second motor of this second screw rod that links to each other with second screw rod and drive, and
First discharging opening with first squeezer is connected to the attaching parts of second charging aperture of second squeezer.
In addition, a steam vent is arranged on the sidewall of second machine barrel, in a kind of embodiment of this extrusion equipment, have an airtight vacuum chamber to link to each other with this steam vent.
Form this steam vent on the machine barrel sidewall, the far-end of the scroll of second screw rod faces this steam vent when scroll moves downward by rotation.The axle of steam vent is inclined to predetermined angle with respect to horizontal line, and the result makes the outboard end of steam vent be on the higher horizontal level than its medial extremity.
Fig. 1 is the cut-away section plane by complete extrusion equipment of the present invention;
Fig. 2 is the vertical cross section of second squeezer cut open along I among Fig. 1-I line;
Fig. 3 is the fragmentary cross-sectional view of this second squeezer charging aperture;
Fig. 4 is the vertical cross section of second squeezer cut open along II among Fig. 3-II line;
Fig. 5 is the fragmentary cross-sectional view of the second squeezer lining and dispenser sleeve;
Fig. 6 is a vertical cross section of second squeezer, shows a kind of improved dispenser sleeve.
Describe one embodiment of the invention in detail referring now to accompanying drawing.
As shown in Figure 1, first squeezer 2 and second squeezer 12 have been comprised according to extrusion equipment of the present invention.Squeezer 2 is equipped with first machine barrel 4, near-end at machine barrel 4 has first charging aperture 5 of moulding material being sent into machine barrel 4, first screw rod 6 of the moulding material that transmission sent into by mouth 5 is installed in machine barrel 4, at the near-end of squeezer 2 first motor 8 of drive screw 6 is installed, discharging opening 10 is arranged at the far-end of squeezer 2.Squeezer 12 also includes second machine barrel 14, has second charging aperture of moulding material being sent in the machine barrel 14 22 at its near-end.Second screw rod 16 is housed in the machine barrel 14, second motor 18 of drive screw 16 is installed at the far-end of squeezer 12.Attaching parts 20 have first communication paths 24 of the charging aperture 22 of the discharging opening 10 that connects machine barrel 4 and machine barrel 14, and the pressure-control valve 28 that first pressure gauge 26 of measuring resin pressure in the path 24 and control will be added to the resin pressure on the squeezer 12 is installed on parts 20.
Inside diameter D according to following relation design squeezer 2 machine barrels 4
1Inside diameter D with squeezer 12 machine barrels 14
2:
D
1/D
2＜1
More specifically say so and design according to following equation:
D
1/ D
2=0.9 to 0.65
For example, work as D
1In the time of=100 millimeters, D
2=130 millimeter.
The extrusion mouth 30 of squeezer 12 is connected with extrusion die 32 by the attaching parts 36 with path 34.The second and the 3rd pressure gauge 38 and 40 of measuring internal resin pressure is housed near extrusion mouth 30 and at the middle part of second attaching parts 36.The thermometer 42 of measuring path 34 inner molten resin temperature on parts 36, also is equipped with.
46 li steam vents 44 that provide the gases that produce when the discharging resin melts of feeding part at squeezer 12, more particularly, steam vent 44 is on the sidewall of cylinder body, and the scroll or the scraper plate 72 of screw rod 16 just face steam vent 44 when scroll 72 rotates by the direction of arrow shown in Figure 2 downwards by means of screw rod 16.In the present embodiment, hole 44 is arranged to such an extent that make its axle all become the inclination of about 45 with horizontal line or vertical line, and while normal with respect to screw rod 16 on the direction opposite with screw rod 16 direction of rotation also is inclined to 45.But the inclination angle (A) with respect to screw rod 16 normals can be selected arbitrarily in 30 ° to 90 ° scopes.
As shown in Figure 2, the outboard end in hole 44 links to each other with airtight vacuum chamber 48.Chamber 48 is made of sidewall 52, bottom 50 and top cover 62, and a space 49 isolated with ambient atmosphere is arranged, and usually vacuum is arranged in space 49.The higher level position of the opening 56 in hole 44 sidewall of 48, and position therebetween not in the chamber.Bottom 50 is installed in the bottom of sidewall 52, opens or closes bottom 50 by the suitable locking element 78 as the bolt.Cooling coil 54 and 55 is positioned in respectively on the outer surface of sidewall 52 and bottom 50, their inner surface plays heat exchange surface, be used to cool off 44 resins that release from the hole, these heat exchange surfaces are predetermined distances of 44 opening 56 bottoms in the hole.On the other hand, the pump connector 60 that links to each other with vavuum pump 50 is at the sidewall sections that is higher than opening 56.The top cover 62 that is used for closing vacuum chamber's 48 upper sheds partly is made of transparent material, and this transparent part plays a window, is used for visual observation is carried out in the inside of this airtight vacuum chamber.
Operation to extrusion equipment describes below.
At first, send into mixture from the charging aperture 5 of first squeezer 2 as raw-material thermoplasticity synthetic resin or this resin and a kind of packing material powder.Motor 8 and 18 rotates first and second screw rods 6 and 16 respectively, and the selected position of machine barrel 4 and 14 is heated to predetermined temperature with common method, therefore, discharge from discharging opening 10 by the resin that is in the fritting state that squeezer 2 prepares, and be sent to the charging aperture 22 of second squeezer 12 by communication paths 24.The slackmelt resin that is fed in squeezer 12 machine barrels is transmitted by the far-end of second screw rod 16 to this machine barrel.The gas that resin produces during by machine barrel 14 is aspirated and discharges by vavuum pump 58 by the steam vent 44 opened on feed part 46 and by airtight vacuum chamber 48.
On the other hand, screw rod 16 further mixes the resin of the fusing of having removed gas, and this resin that finally obtains is then from extrusion mouth 30, be fed to pressing mold 32 by passage 34.The synthetic resin of fusion is once being pressed into desirable shape to pressing mold 32.
When the resin of fusion by near the medial extremity in hole 44 time, the partial melting resin is squeezed into hole 44, but because hole 44 is inclined to a predetermined angular as shown in Figure 2, so the resin that major part is squeezed in since it self weight turn back to again in the machine barrel 14, roll once more by screw rod 16 then, and partly mix with other resin.After this, resin is evenly mixed and is fed to pressing mold 32.
In the equipment of the present embodiment, the amount of resin of feed-in pressing mold 32 is by the control of the speed of screw rod 16, and the rotary speed that will control the screw rod 6 of squeezer 2 makes the pressure value by 38 indications of second pressure gauge always keep substantially constant.In addition, but when needing controlled pressure control valve 28 in the indicated pressure of steady pressure 38.This control can simultaneously be observed the pressure of pressure gauge 38 and observed from the hole the 44 molten resin amounts one sides that are squeezed into the airtight vacuum chamber and manually carry out by the operator.Another way is that one of installation is equipped with the automaton of a plurality of sensors to control the rotational frequency of screw rod 6 automatically.
In addition, in extrusion equipment of the present invention, because the machine barrel inside diameter D of first squeezer 2
1Less than second squeezer, 12 machine barrel inside diameter D
2So it is less that squeezer 12 is subjected to the adverse effect of variation of the amount of resin extruded from squeezer 2.Because the velocity of rotation of each screw rod is easy to accurate control,, make the amount of resin of extruding from steam vent reduce so can select squeezer 2 screw rod rotational frequencies to come steady pressure.
In addition, because the machine barrel of first and second squeezers has different diameters, therefore, the screw rod velocity of rotation of first squeezer can relatively increase.Owing to this cause, improved the plasticizing efficiency and the melting efficiency of material web.
On the other hand, the internal diameter of the second squeezer machine barrel is done greatlyyer, so the second squeezer screw rod changes slowlyer, approximately than the screw rod of first squeezer slow 10 to 50%.Therefore, the resin that is sent in second machine barrel can be heated fully by heater, but can not produce overheatedly because of slowly running of second screw rod, so resin seldom becomes bad.
In this extrusion equipment, when entire equipment was moved, the thin slice of fritting and packing material transmitted vertically with respect to machine barrel 14 and screw rod 16, discharged the gas that produces when resin melts by hole 44 in this transmission course.A part is in fusing or the resin 66 of semi-molten state is squeezed in the hole 44 as previously mentioned, so but resin in hole 44 or packing material because hole 44 be as shown in Figure 2 tilt owing to gravity is forced to return.In addition, owing to hole 44 predetermined angle of normal slope with respect to screw rod on the direction opposite with the screw rod rotation, so 44 resins of gushing out are scraped off by scroll 72 when screw rod 16 rotates from the hole, thereby most of remaining resin turns back in the machine barrel 14.
But, in hole 44, collect and to expand change gradually attached to the resin fusion on its inner wall surface or fritting many, push and open the valve 76 of normally closing, be squeezed into airtight vacuum chamber 48 then.
The resin of getting into chamber 48 flows downward and is stored in the there.Simultaneously, gas and resin are separated, and gas is taken away by pump 58.
When the resin in being stored in chamber 48 levels off to the connector 56 of steam vent, pump 58 temporarily quits work so that the pressure of 48 li of chambers equates that with ambient atmosphere loosening fasteners 78 is opened bottom 50, removes the resin that has solidified from chamber 48.After this, cover bottom 50 and fastening, restart pump 58 with securing member 78.
As previously mentioned, in extrusion equipment of the present invention, the resin of extruding from steam vent is cured chamber 48, owing to this reason, can at an easy rate resin be excluded, and almost not have contaminated surrounding air to pollute, so can reuse owing to clamp-on the resin of airtight vacuum chamber.In addition, because top cover 62 includes a transparent part, so can observe the inside of chamber 48 at an easy rate.Top cover 62 and bottom 50 can also be opened the inside that is beneficial to clean room 48.
When hole 44 was set at as previously described scope with respect to the inclination angle A of the normal of machine barrel 14, the resin that enters into hole 44 may be easy to turn back in the cylinder body.In the time of outside angle A is provided with superincumbent scope, the amount of resin that enters into hole 44 just increases.
When hole 44 is set up the left and right sides at 45 with respect to horizontal inclination angle, chamber 48 is assembled on the hole 44 just is easy to, and can reduce the amount of resin that enters.
As the improvement of this embodiment, can provide and install two such airtight vacuum chamber 48, so that they are alternately slided on the opening 56 in hole 44.When one of them airtight vacuum chamber 48 near filling resin and resin will be got rid of the time, just another airtight vacuum chamber can being connected on the opening 56, so that replace previous chamber.So in this improvement, can further improve the efficient of extrusion equipment.
A structure that centers on second squeezer, 12 charging apertures 22 of the present invention is now described.
As shown in Figure 3, ring bush 84 has been installed in machine barrel 14 the insides at squeezer 12, formed with respect to this lining axle at the near-end of lining 84 and be the inclined surface 84a that tilts, link to each other with mouth 22 with the space 85 that machine barrel 14 inner surfaces limit, seen shown in Figure 5 by surperficial 84a.At the near-end of lining 84, from the predetermined degree of depth of the face to of this near-end, form a bigger dispenser sleeve of diameter and insert position 86, the distribution lining 88 of annular just is inserted into 86 li at this position, and some near-end from lining 84 highlights.As shown in Figure 3, the near-end 90 of lining 88 is supporting the end face 92 of drive part 80.Formed distribution passage 96 by the further space 85 that limits of the outer surface of lining 88, be used for distributing the molten resin of sending into from mouth 22 along the outer surface of lining 88.On the periphery of the near-end of lining 88, a plurality of feed wells 98 are arranged, passage 98 is communicated with space in the machine barrel 14 by these feed wells.
As shown in Figure 4, in this embodiment, form 16 feed wells 98 at interval with angle same on this periphery, the number of groove 98 is preferably between 8 to 20, but according to the character of the internal diameter and the resin of machine barrel, this number can superincumbent scope outside.
As shown in Figure 4, each groove 98 radially outward enlarges, thereby has infundibulate.As improvement, the groove 98 of formation to make it axle with the direction of screw rod 16 direction of rotation on, become an angle of determining with respect to the normal slope of screw rod 16, as shown in Figure 6.
In this embodiment, the machine barrel 14 and the lining 84 that pass second squeezer 12 have promptly formed long and narrow steam vent 44, as shown in Figure 5.
Near the top charging aperture that constitutes said, the resin of fritting is delivered to passage 96 from first squeezer, 2 through ports 22 at second squeezer, clamp-on machine barrel 14 from a plurality of grooves 98 of lining 88 again.The resin 68 of fritting projects into 98 li of each grooves subsequently, forms the little protuberance that dotted line is represented among Fig. 4, by the scroll 72 of screw rod 16 it is scraped, and then transmits to mouth 30.
In this extrusion equipment, the slackmelt resin that is added on the mouth 22 at first is added to passage 96.Because the width of passage 96 reduces downwards gradually from mouth 22, so the resin in distributing passage moves down, and join the machine barrel from these feed wells consistently, so amount of resin reduces according to the volume that distributes passage.The result makes on the whole passage 96 resin Anywhere present the pressure uniformity, and the amount of resin of sending into the machine barrel 14 from each groove 98 all equates.
As shown in Figure 5, because a plurality of feed wells 98 are to form at the end of lining 88, so be easily changing color or changing the dismounting of resin material and clean these feed wells 98.
As the front was narrated, in extrusion equipment of the present invention, the slackmelt resin that squeezes out from first squeezer 2 was added to the charging aperture 22 of second squeezer 12 by communication passage 24.The resin of this fritting is admitted to the distribution passage 96 of squeezer 12, extend into the inside of machine barrel 14 then from the feed well 98 that distributes lining 88 peripheries to form, and portion has formed little protuberance within it.Resin is scraped by the scroll 72 of rotary screw 16 consistently, becomes thin slice once more.These become the rotation constantly vertically transmission of the resin of thin slice with screw rod 16.
Therefore, in extrusion equipment of the present invention, because slackmelt resin distributes by a plurality of feed wells from first squeezer, and then send into the machine barrel of second squeezer, so little by the amount that each feed well is carried, and stretch into inwards from feed well the resin that forms tab it with constantly scraped off before screw surface contacts by scroll.Therefore, unlike traditional extrusion equipment, the resin of fritting has the outer surface that neither adheres to screw rod, the trend of also not rotating therewith, but will form flakelet, can be transmitted reliably by each scroll because of working as.Consequently, the amount of resin of being discharged by second squeezer is stable, and the quality of resin also is a uniformity.
In addition, because there is a steam vent that is used to get rid of the gas of supervening at a near position charging aperture, therefore near the surface area of the slackmelt resin of the flakiness shape steam vent has increased, and the result fully emits the gas that is included in wherein.
Claims (9)
1, a kind of extrusion equipment comprises a squeezer, and it has
A machine barrel;
Charging aperture that is used for moulding material is sent into said machine barrel in the proximal end of said machine barrel;
One the far-end of said machine barrel be used for will be included in the discharging opening that the moulding material in the said machine barrel emits;
One in said machine barrel, have the screw rod of scroll;
A motor that links to each other and drive it with said screw rod;
It is characterized in that also comprising a steam vent that on the sidewall sections of said machine barrel, forms, the far-end of the scroll of said screw rod faces this steam vent when said scroll moves down by means of the rotation of said screw rod, an axle of said steam vent is inclined to a predetermined angular with respect to a vertical line, therefore, said steam vent outboard end promptly is in than on the higher horizontal plane of its medial extremity;
An airtight vacuum chamber that links to each other with said steam vent; And
A vavuum pump that links to each other with said airtight vacuum chamber.
2, equipment as claimed in claim 1 is characterized in that said steam vent is set up at 45 with respect to this horizontal inclination angle.
3, equipment as claimed in claim 1, the axis that it is characterized in that said steam vent also with the direction of said screw rod direction of rotation on become a predetermined angular with respect to the normal slope of said screw rod.
4, equipment as claimed in claim 3 is characterized in that said steam vent is set at respect to the angle of inclination of said normal in 30 ° to 90 ° the scope.
5, equipment as claimed in claim 1 is characterized in that said airtight vacuum chamber comprises a bottom that can open and close, and one partly is made of transparent panel so that can observe the top cover of internal vacuum chamber by it.
6, equipment as claimed in claim 1, the opening that it is characterized in that said steam vent outboard end is to form on the sidewall sections that omits a little horizontal level of height than said airtight vacuum chamber mid portion, and the connector that communicates with said vavuum pump is to form on the sidewall sections of the horizontal level higher than said opening.
7, equipment as claimed in claim 1 is characterized in that leading on the zone at least of said airtight vacuum chamber sidewall is equipped with a cooling coil.
8, equipment as claimed in claim 1 is characterized in that said cooling coil is mounted on the said bottom of said airtight vacuum chamber.
9, equipment as claimed in claim 1 is characterised in that also to comprise:
Attaching parts that connect the charging aperture of described squeezer;
Another squeezer with discharging opening is connected on the above-mentioned attaching parts.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61028182A JPS62184829A (en) | 1986-02-12 | 1986-02-12 | Vent type extruder |
| JP28183/86 | 1986-02-12 | ||
| JP28182/86 | 1986-02-12 | ||
| JP27891/86 | 1986-02-13 | ||
| JP61027891A JPH0657421B2 (en) | 1986-02-13 | 1986-02-13 | Two-stage type extruder |
| CN87101886A CN1009718B (en) | 1986-02-12 | 1987-02-11 | Extruding apparatus for extruding synthetic resin |
Related Parent Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87101886A Division CN1009718B (en) | 1986-02-12 | 1987-02-11 | Extruding apparatus for extruding synthetic resin |
| CN87101886 Division | 1987-02-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1049821A CN1049821A (en) | 1991-03-13 |
| CN1014690B true CN1014690B (en) | 1991-11-13 |
Family
ID=27178867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90102280A Expired CN1014690B (en) | 1986-02-12 | 1987-02-11 | Extruding apparatus for extruding synthetic resin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1014690B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100280928B1 (en) * | 1992-08-31 | 2001-04-02 | 히로시 모로하시 | Plasticizer and plasticization method using the device |
| CN102001175A (en) * | 2010-09-27 | 2011-04-06 | 张家港市民扬塑胶科技有限公司 | Plastic extruder |
| CN108000838A (en) * | 2017-11-11 | 2018-05-08 | 惠水县凡趣创意科技有限公司 | A kind of novel plastic extrusion machine |
-
1987
- 1987-02-11 CN CN90102280A patent/CN1014690B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1049821A (en) | 1991-03-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |